Technology Insights

How to Switch Between Different Versions of GCC and G++ in Backtrack 4 Final (Or Any Version Of Ubuntu)

I had a Backtrack user on IRC today asking about using different versions of GCC in Backtrack. Since Backtrack is based on Ubuntu Linux this article will apply to any version of Ubuntu but I wanted to write something specifically for Backtrack users. There are many reasons for needing different versions of GCC and G++. One of the main ones is installing a program which requires a kernel module to be built. What happens is that if the kernel was built with GCC-4.1 and GCC has since been updated to GCC-4.3 sometimes the build will fail dude to a kernel/GCC –version mismatch. Below I detail the steps to downgrade from GCC-4.3 to GCC-4.1 on Backtrack Linux.